Display device

Abstract

A display device includes a first substrate, a second substrate, a liquid crystal layer, a plurality of signal lines, a dielectric layer, a plurality of first pixel electrodes, an auxiliary electrode layer, and a control element. The second substrate and the first substrate are oppositely disposed. The liquid crystal layer is disposed between the first substrate and the second substrate. The signal lines are disposed on the first substrate. The dielectric layer is disposed on the signal lines. The first pixel electrodes are disposed on the dielectric layer, are separated from each other, and are electrically connected to one of the signal lines respectively. The auxiliary electrode layer is disposed between the first substrate and the dielectric layer, and the auxiliary electrode layer is at least partially located, in a vertical projection on the first substrate, between two adjacent first pixel electrodes, and at least some of the signal lines overlap with some of the first pixel electrodes in the direction perpendicular to the first substrate. The control element is disposed on the first substrate and is electrically connected to the signal lines and the auxiliary electrode layer.

What is claimed is: 
     
       1. A display device, comprising:
 a first substrate; 
 a second substrate; 
 a liquid crystal layer, disposed between the first substrate and the second substrate; 
 a plurality of signal lines, disposed on the first substrate and extended in a first direction; 
 a dielectric layer, disposed on the plurality of signal lines; 
 a plurality of first pixel electrodes, disposed on the dielectric layer, wherein each first pixel electrode is electrically connected to one of the signal lines respectively; 
 an auxiliary electrode layer disposed between the first substrate and the dielectric layer; and 
 a control element, disposed on the first substrate and electrically connected to these signal lines and the auxiliary electrode layer; 
 wherein the auxiliary electrode layer is at least partially located, in a vertical projection on the first substrate, between two adjacent first pixel electrodes, and at least some of the signal lines and some of the first pixel electrodes overlap with each other in the vertical projection on the first substrate; 
 wherein the first pixel electrodes are arranged into a plurality of columns and a plurality of rows, the auxiliary electrode layer comprises a plurality of third auxiliary electrodes respectively located between two adjacent rows of the first pixel electrodes in the vertical projection on the first substrate, and the third auxiliary electrodes are extended perpendicularly to the first direction; and 
 wherein the third auxiliary electrodes gradually increase lengths as further away from the control element. 
 
     
     
       2. The display device according to  claim 1 , wherein the auxiliary electrode layer and the signal lines are in one film layer. 
     
     
       3. The display device according to  claim 1 , wherein light transmittance of the signal lines and the auxiliary electrode layer is greater than 80%. 
     
     
       4. The display device according to  claim 1 , wherein the first pixel electrodes are arranged into a plurality of columns and a plurality of rows, the auxiliary electrode layer comprises a plurality of first auxiliary electrodes extended in the first direction, and these first auxiliary electrodes are located, in the vertical projection on the first substrate, between two adjacent columns of the first pixel electrodes. 
     
     
       5. The display device according to  claim 4 , wherein the auxiliary electrode layer is not disposed between two adjacent rows of the first pixel electrodes in the vertical projection on the first substrate. 
     
     
       6. The display device according to  claim 5 , further comprising an alignment layer disposed between the first pixel electrodes and the liquid crystal layer, wherein the first auxiliary electrodes are extended in the first direction, the liquid crystal layer is a positive liquid crystal, and the alignment layer is aligned perpendicularly to the first direction. 
     
     
       7. The display device according to  claim 5 , further comprising an alignment layer disposed between the first pixel electrodes and the liquid crystal layer, wherein the first auxiliary electrodes are extended in the first direction, the liquid crystal layer is a negative liquid crystal, and the alignment layer is aligned parallel to the first direction. 
     
     
       8. The display device according to  claim 4 , wherein the auxiliary electrode layer further comprises a second auxiliary electrode extended in a second direction perpendicular to the first direction, and the first pixel electrodes are located between the second auxiliary electrode and the control element in the first direction. 
     
     
       9. The display device according to  claim 1 , wherein the auxiliary electrode layer is not disposed between two adjacent columns of the first pixel electrodes in the vertical projection on the first substrate. 
     
     
       10. The display device according to  claim 9 , further comprising an alignment layer disposed between the pixel electrodes and the liquid crystal layer, wherein the liquid crystal layer is a positive liquid crystal, and the alignment layer is aligned parallel to the first direction. 
     
     
       11. The display device according to  claim 9 , further comprising an alignment layer disposed between the pixel electrodes and the liquid crystal layer, wherein the liquid crystal layer is a negative liquid crystal, and the alignment layer is aligned perpendicularly to the first direction. 
     
     
       12. The display device according to  claim 1 , further comprising a plurality of second pixel electrodes respectively disposed on a periphery of one of the first pixel electrodes and respectively electrically connected to one of the signal lines, wherein the first pixel electrode is different in size from the second pixel electrode. 
     
     
       13. The display device according to  claim 12 , wherein the auxiliary electrode layer further comprises a plurality of first auxiliary electrodes respectively disposed between the first pixel electrodes and the second pixel electrodes in the vertical projection on the first substrate, and are respectively electrically connected to the control element via one of the signal lines. 
     
     
       14. The display device according to any one of  claim 1 , further comprising a display panel disposed laterally above the second substrate, wherein the display panel is an active display panel. 
     
     
       15. The display device according to any one of  claim 1 , further comprising a display panel disposed laterally below the first substrate, wherein the liquid crystal layer is a polymer network liquid crystal or a polymer dispersed liquid crystal. 
     
     
       16. A display device, comprising:
 a first substrate; 
 a second substrate; 
 a liquid crystal layer, disposed between the first substrate and the second substrate; 
 a plurality of signal lines, disposed on the first substrate and extended in a first direction; 
 a dielectric layer, disposed on the plurality of signal lines; 
 a plurality of first pixel electrodes, disposed on the dielectric layer, wherein each first pixel electrode is electrically connected to one of the signal lines respectively; 
 an auxiliary electrode layer disposed between the first substrate and the dielectric layer; and 
 a control element, disposed on the first substrate and electrically connected to these signal lines and the auxiliary electrode layer; 
 wherein the auxiliary electrode layer is at least partially located, in a vertical projection on the first substrate, between two adjacent first pixel electrodes, and at least some of the signal lines and some of the first pixel electrodes overlap with each other in the vertical projection on the first substrate; 
 wherein the auxiliary electrode layer further comprises a plurality of fourth auxiliary electrodes, each of these fourth auxiliary electrodes overlaps with one of the first pixel electrodes in the vertical projection on the first substrate, and width of the fourth auxiliary electrodes gradually increases along the first direction; and 
 wherein each of the fourth auxiliary electrodes and the corresponding first pixel electrode have a first overlap area in a direction perpendicular to the first substrate, and the first overlap areas corresponding to the first pixel electrode gradually increase as further away from the control element. 
 
     
     
       17. The display device according to  claim 16 , wherein in each of the first pixel electrodes, the signal lines and the corresponding first pixel electrodes have a second overlap area in the direction perpendicular to the first substrate, and each of the first pixel electrodes corresponds to a sum of the first overlap area and the second overlap area, and variations between the sums corresponding to these first pixel electrodes are less than 20%.